CN106205630A - Video recording system reduces the system of motor vibration noise - Google Patents
Video recording system reduces the system of motor vibration noise Download PDFInfo
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- CN106205630A CN106205630A CN201510221813.8A CN201510221813A CN106205630A CN 106205630 A CN106205630 A CN 106205630A CN 201510221813 A CN201510221813 A CN 201510221813A CN 106205630 A CN106205630 A CN 106205630A
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- motor
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Abstract
The present invention relates to electronic technology field, it is specifically related to a kind of video recording system reduces the system of motor vibration noise, it is applied to a video recording system, video recording system includes motor, also include the first mike, arrange at a distance of the first setpoint distance with motor, for capture containing motor vibration noise and the first voice signal of ambient sound；Second microphone, arrange at a distance of the second setpoint distance with motor, for capture containing motor vibration noise and the second voice signal of ambient sound, the second setpoint distance is more than the first setpoint distance, and the motor vibration noise of second microphone capture is weaker than the motor vibration noise of the first microphones capture；Signal processing apparatus, processes to adjust the beam direction of the microphone array of the first mike and second microphone composition to the first voice signal and the second voice signal, and beam direction forms zero point in the orientation at motor place.The present invention can improve signal to noise ratio, the beneficially performance improvement of video recording system.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of system reducing motor vibration noise.
Background technology
In video recording system, in order to obtain image clearly, need to focus at any time in shooting process,
Ensure the clear of main body image on taken the photograph picture, owing to manual focus needs to spend the longer time, mostly
The video recording system of number uses auto-focusing, and computing and process by special chip control in camera lens
Focusing motor make camera lens group move forward and backward, thus complete automatic accurate focusing, regarding of prior art
Frequently the usual built-in single mike of Camcording system, is used as shooting recording and is used, but, this set also makes
System sound of motor vibrations under record while recording, these noises are often difficult to separate and remove,
Have impact on the performance of system.
Summary of the invention
It is an object of the invention to, it is provided that a kind of video recording system reduces the system of motor vibration noise,
Solve above technical problem.
Technical problem solved by the invention can realize by the following technical solutions:
Video recording system reduces the system of motor vibration noise, is applied to a video recording system, its
In, described video recording system includes motor, also includes,
First mike, is arranged at a distance of the first setpoint distance with described motor, for capture containing described horse
Reach the first voice signal of vibration noise and ambient sound；
Second microphone, is arranged at a distance of the second setpoint distance with described motor, for capture containing described horse
Reaching the second voice signal of vibration noise and ambient sound, described second setpoint distance sets more than described first
Set a distance, the described motor vibration noise of described second microphone capture is weaker than described first microphones capture
Motor vibration noise；
Signal processing apparatus, is connected with described first mike and described second microphone, respectively to described
First voice signal and described second voice signal carry out processing to adjust described first mike and described
The beam direction of the microphone array of two mike compositions, described beam direction is in the side at described motor place
Position forms zero point.
The video recording system of the present invention reduces the system of motor vibration noise, described first mike and/
Or described second microphone uses the mike of full directing.
The video recording system of the present invention reduces the system of motor vibration noise, described first mike,
Described second microphone is positioned at the same side of described motor, described first mike and described second microphone
Between distance more than 5cm less than 15cm.
The video recording system of the present invention reduces the system of motor vibration noise, described first mike,
Described second microphone and described motor are by linear array, and described first mike is arranged near described motor,
Described second microphone is arranged away from described motor.
The video recording system of the present invention reduces the system of motor vibration noise, described first mike and
Described second microphone uses MEMS condenser microphone；Or, described first mike and described second wheat
Gram elegance numeral electret microphone.
The video recording system of the present invention reduces the system of motor vibration noise, described signal processing apparatus
Including,
Delay cell, is connected with described first voice signal or described second voice signal, for described
First voice signal or described second voice signal carry out delay process, with compensating time delay；
Filter cell, for being filtered process to the signal after delay process；
Energy detection unit, for detecting signal energy, obtains the first energy value and the second energy
Value；
Comparing unit, for comparing described first energy value and described second energy value, to obtain
First energy value described in one realizes positioning of beam with the maximum of described second energy value ratio.
Reducing the system of motor vibration noise in the video recording system of the present invention, described filter cell is adopted
Use sef-adapting filter.
Reducing the system of motor vibration noise in the video recording system of the present invention, described motor uses microcomputer
Electricity system motor.
The present invention also provides for a kind of portable mobile termianl, comprises reduction horse in above-mentioned video recording system
Reach the system of vibration noise.
Beneficial effect: owing to using above technical scheme, the present invention can form directivity pickup wave beam,
To greatly reduce the motor noises interference beyond pickup wave beam, the present invention can improve signal to noise ratio, is conducive to
The performance improvement of video recording system.
Accompanying drawing explanation
Fig. 1 is the pickup wave beam schematic diagram of the microphone array formation of the present invention；
Fig. 2 is the system structure schematic diagram of the present invention；
Fig. 3 is the circuit diagram of a kind of specific embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
It should be noted that in the case of not conflicting, the embodiment in the present invention and the spy in embodiment
Levy and can be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
With reference to Fig. 1, video recording system reduces the system of motor vibration noise, is applied to a video and takes the photograph
Recording system, wherein, video recording system includes motor 1, also includes,
First mike 11, is arranged at a distance of the first setpoint distance with motor 1, for capture containing motor 1
Vibration noise and the first voice signal of ambient sound；
Second microphone 12, is arranged at a distance of the second setpoint distance with motor 1, for capture containing motor 1
Vibration noise and the second voice signal of ambient sound, the second setpoint distance is more than the first setpoint distance, the
Motor 1 vibration noise of two mike 12 captures is weaker than motor 1 vibration of the first mike 11 capture and makes an uproar
Sound；
Signal processing apparatus 13, is connected with the first mike 11 and second microphone 12, respectively to first
Voice signal and the second voice signal carry out processing to adjust the first mike 11 and second microphone 12 groups
The beam direction of the microphone array become, beam direction forms zero point in the orientation at motor 1 place.
Comparing with the video recording system with single mike of prior art, two mikes are at time-frequency
Add a spatial domain on the basis of territory, the signal from space different azimuth is carried out Space-time domain associating
Process, form directivity pickup wave beam, to greatly reduce motor 1 noise jamming beyond pickup wave beam,
The present invention can improve signal to noise ratio, the beneficially performance improvement of video recording system.
The video recording system of the present invention reduces the system of motor 1 vibration noise, the first mike 11
And/or second microphone 12 uses the mike of full directing.
The video recording system of the present invention reduces the system of motor 1 vibration noise, as it is shown in figure 1, the
One mike 11, second microphone 12 are preferably placed at the same side of motor 1, the first mike 11 and
Distance between two mikes 12 is less than 15cm more than 5cm.Preferably smaller than 10cm.
The system of reduction motor 1 vibration noise in the video recording system of the present invention, the first mike 11,
Second microphone 12 and motor 1 are by linear array, and the first mike 11 is arranged near motor 1, and second
Mike 12 is arranged away from motor 1.
The video recording system of the present invention reduces the system of motor 1 vibration noise, the first mike 11
MEMS condenser microphone is used with second microphone 12；Or, the first mike 11 and second microphone
12 use numeral electret microphone.
The video recording system of the present invention reduces the system of motor 1 vibration noise, signal processing apparatus bag
Include,
Delay cell 111, is connected with the first voice signal or the second voice signal, for the first voice
Signal or the second voice signal carry out delay process, with compensating time delay；
Filter cell 112, for being filtered process to the signal after delay process；
Energy detection unit 113, for detecting signal energy, obtains the first energy value and second
Energy value；
Comparing unit 114, for comparing the first energy value and the second energy value, to obtain one the
The maximum of one energy value and the second energy value ratio realizes positioning of beam.
Reducing the system of motor 1 vibration noise in the video recording system of the present invention, filter cell uses
Sef-adapting filter.
The present invention can also be adaptively adjusted the weight coefficient of each passage of microphone array, by each passage
Reception data be weighted, form beam position information source interested, simultaneously in the direction of interference
Form zero point, thus reach strengthen echo signal and effectively suppress strongly disturbing purpose.The present invention is all right
Use other beamforming algorithms of the prior art to realize beam direction to adjust.
With reference to shown in Fig. 3, the present invention can include the first delay cell 111a and the second delay cell 111b,
First sef-adapting filter 112a and the second sef-adapting filter 112b, also includes arithmetic element 115, fortune
The outfan calculating unit connects digital signal processing chip, and the present invention is anti-by the signal capturing mike
Compare again, find the peak value of energy, utilize the range difference of two mikes to form a non-omnidirectional sound
The wave beam of pickup, it is achieved dynamic beam positions, so that the sound of capture is selective.
The concrete formation wave beam algorithm of the present invention can use technology well known to those skilled in the art,
This does not repeats.
Reducing the system of motor 1 vibration noise in the video recording system of the present invention, motor 1 uses microcomputer
Electricity system motor 1.
The present invention also provides for a kind of portable mobile termianl, comprises reduction horse in above-mentioned video recording system
Reach the system of 1 vibration noise.The present invention may be used for realizing on the portable mobile termianl of band photographic head taking the photograph
During Xiang, motor noise eliminates.
The foregoing is only preferred embodiment of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, it should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, all should comprise
Within the scope of the present invention.
Claims (9)
1. video recording system reduces the system of motor vibration noise, is applied to a video recording system,
It is characterized in that, described video recording system includes motor, also includes,
First mike, is arranged at a distance of the first setpoint distance with described motor, for capture containing described horse
Reach the first voice signal of vibration noise and ambient sound；
Second microphone, is arranged at a distance of the second setpoint distance with described motor, for capture containing described horse
Reaching the second voice signal of vibration noise and ambient sound, described second setpoint distance sets more than described first
Set a distance, the described motor vibration noise of described second microphone capture is weaker than described first microphones capture
Motor vibration noise；
Signal processing apparatus, is connected with described first mike and described second microphone, respectively to described
First voice signal and described second voice signal carry out processing to adjust described first mike and described
The beam direction of the microphone array of two mike compositions, described beam direction is in the side at described motor place
Position forms zero point.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, described first mike and/or described second microphone use the mike of full directing.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, described first mike, described second microphone are positioned at the same side of described motor, described
Distance between first mike and described second microphone is less than 15cm more than 5cm.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, linear array pressed by described first mike, described second microphone and described motor, described
First mike is arranged near described motor, and described second microphone is arranged away from described motor.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, described first mike and described second microphone use MEMS condenser microphone；Or,
Described first mike and described second microphone use numeral electret microphone.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, described signal processing apparatus includes,
Delay cell, is connected with described first voice signal or described second voice signal, for described
First voice signal or described second voice signal carry out delay process, with compensating time delay；
Filter cell, for being filtered process to the signal after delay process；
Energy detection unit, for detecting signal energy, obtains the first energy value and the second energy
Value；
Comparing unit, for comparing described first energy value and described second energy value, to obtain
First energy value described in one realizes positioning of beam with the maximum of described second energy value ratio.
Video recording system the most according to claim 6 reduces the system of motor vibration noise, its
Being characterised by, described filter cell uses sef-adapting filter.
Video recording system the most according to claim 1 reduces the system of motor vibration noise, its
Being characterised by, described motor uses MEMS motor.
9. a portable mobile termianl, it is characterised in that comprise claim 1 to 8 any one institute
The video recording system stated reduces the system of motor vibration noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510221813.8A CN106205630A (en) | 2015-05-04 | 2015-05-04 | Video recording system reduces the system of motor vibration noise |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510221813.8A CN106205630A (en) | 2015-05-04 | 2015-05-04 | Video recording system reduces the system of motor vibration noise |
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| CN106205630A true CN106205630A (en) | 2016-12-07 |
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| CN201510221813.8A Pending CN106205630A (en) | 2015-05-04 | 2015-05-04 | Video recording system reduces the system of motor vibration noise |
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Cited By (5)
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| CN109842755A (en) * | 2017-11-27 | 2019-06-04 | 华为终端有限公司 | A kind of control method of motor, control circuit and electronic equipment |
| CN110062083A (en) * | 2019-05-27 | 2019-07-26 | 维沃移动通信有限公司 | A kind of method of canceling noise and mobile terminal |
| CN110544487A (en) * | 2019-10-18 | 2019-12-06 | 珠海格力智能装备有限公司 | Microphone-based voice detection method and device |
| CN112309360A (en) * | 2020-10-27 | 2021-02-02 | 深圳市百川安防科技有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
| CN115037827A (en) * | 2022-08-11 | 2022-09-09 | 荣耀终端有限公司 | Driving voltage adjusting method, electronic device and storage medium |
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| US20120287303A1 (en) * | 2011-05-10 | 2012-11-15 | Funai Electric Co., Ltd. | Sound separating device and camera unit including the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842755A (en) * | 2017-11-27 | 2019-06-04 | 华为终端有限公司 | A kind of control method of motor, control circuit and electronic equipment |
| CN109842755B (en) * | 2017-11-27 | 2021-01-15 | 华为终端有限公司 | Motor control method, control circuit and electronic equipment |
| CN110062083A (en) * | 2019-05-27 | 2019-07-26 | 维沃移动通信有限公司 | A kind of method of canceling noise and mobile terminal |
| CN110544487A (en) * | 2019-10-18 | 2019-12-06 | 珠海格力智能装备有限公司 | Microphone-based voice detection method and device |
| CN112309360A (en) * | 2020-10-27 | 2021-02-02 | 深圳市百川安防科技有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
| CN112309360B (en) * | 2020-10-27 | 2021-08-10 | 深圳市睿联技术股份有限公司 | Audio noise reduction system, shooting equipment and audio equipment |
| CN115037827A (en) * | 2022-08-11 | 2022-09-09 | 荣耀终端有限公司 | Driving voltage adjusting method, electronic device and storage medium |
| CN115037827B (en) * | 2022-08-11 | 2023-01-10 | 荣耀终端有限公司 | Driving voltage adjusting method, electronic device and storage medium |
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